Checking The Platen Gap - Epson WF-7525 Service Manual

Epson WF-7520/7510/7010 series

5.2.2 Checking the Platen Gap

This section describes the procedure for checking the platen gap (PG) necessary when removing the Printhead or
in a similar case.
This printer does not have any PG adjustment mechanism, however, it is designed so that
the platen gap can fall within the expected range if you correctly reassemble the unit
according to this manual. If the PG does not fall within the standard range after
performing the platen gap check described in this section, first check if the unit is
correctly reassembled following the instructions in this manual. Even if the unit is
correctly reassembled but the PG still cannot fall within the standard range, replace the
unit with a new one.
The standard range of the PG is as follows:
• Standard: 1.7 ± 0.2 mm
Tools
Thickness gauge: 1.5 mm (x2), 1.9 mm (x2)
Checking procedure
When checking the PG, make sure of the following.
Check the PG with the ink cartridges installed and the Housing Upper removed.
Move the Carriage Assy by pulling the Timing Belt.
Be careful not to damage the nozzle surface of the Printhead with the thickness gauge.
1. Move the Carriage Assy to the center of the printer.
2. Place the thickness gauges (1.5 mm) on the positions shown below.
130-digit side
3. Pull the CR Timing Belt to move the CR Unit to both ends and confirm the CR Unit does not touch the
thickness gauges. If the CR Unit comes in contact with the thickness gauges, the PG is smaller than the
standard value, therefore, check if the unit is correctly reassembled. If not, reassemble the unit and perform
PG check again. (If the unit is correctly reassembled, replace the unit with a new one.)
4. Move the CR Unit to the center, and replace the thickness gauges (1.5 mm) with the thickness gauges
(1.9 mm) on the same positions as
5. Pull the CR Timing Belt to move the CR Unit to both ends and confirm the CR Unit touches the thickness
gauges. If the CR Unit does not come in contact with the thickness gauges, the PG is greater than the standard
value, therefore, check if the unit is correctly reassembled. If not, reassemble the unit and perform PG check
again. (If the unit is correctly reassembled, replace the unit with a new one.)
Adjustment
Thickness gauge
Figure 5-2. Position of the Thickness Gauge
Step 2.
Details of Adjustments
0-digit side
Thickness gauge
Revision A
76